According to C E Franklin "British Napoleonic Uniforms" by 1800 the helmet had changed to a more elegant form of the Tarleton, officers' turban of facing colour or in some cases leopard skin; other ranks from the turn of the century black turban with white over red plume.Cartridge boxes shown as plain black.No mention of trumpets and their cords. From a series of drawings by Jacques Brouillet on the Egyptian Campaign:

thanks for all the information so far – even to upload such a lot of pictures.About 11th Light Dragoons, their facing colour was pale buff, which may have appeared white – so white plumes might haven been light buff.In case there is no information about the cords and tassels of the trumpets in 1801 – what was the rule of them later??

In John Plimlott's 1977 book for Almark Publishing Co of England, with illustrations by Emir Bukhari – British Light Cavalry 1800-1815 – they show (1) a trumpeter of the 17th Regiment, full dress 1800, wearing a black cylindrical felt shako with large white plume, and white cords wrapped around twice – or two cords. There is a red undervest edged white; the tunic is also red with white rolled wings, white collar and pointed cuffs, edged silver. There appear to be 7 lace tapes across the coat front, with the front open at the 5th row downward. The tapes are joined to each other with a kind of point at the ends. White turnbacks, white tight breeches, straight topped boots up to below the knee. No horse or shabraque shown. The trumpet is white metal – steel? – and the cording is white or silver or a mix. Same page shows schematic for (2)trumpet major of the 10th Regiment, 1796, (became hussars later) same coat in buff (this may be a dark yellow, as the 10th had yellow collar and cuffs when they became hussars, and before changing to scarlet) with red collar, cuffs and turnbacks. The tapes and edging seem to be gold thread. No shako shown, but could well be the Tarleton type worn until the Shako came in. The schematic for a corporal of teh 10th next to it has the same dark yellow collar and pointed cuffs, with what appears to be a yellow girdle, and two yellow (double-edged white) starps around right arm above the elbow (left arm not shown). Also yellow shoulder strap edged white with white metal button. 3) the Trumpeter of the 15th, 1796-1806, (became hussars later) service dress, shown with scarlet topped mirleton, bottom black band with white cords draped around. White or silver top band, tall plume – fluffy, red bottom 1/3 white top 2/3. scarlet shell jacket, no turnbacks, no sash at the waist. Blue collar and cuffs, edged silver or white. 8 tapes across the chest, joined as before, with lace down the single-breasted from and around the bottom of the shell. Light gray overall breeches covering the boots, with broad scarlet stripe down the side. Blach sabretache, does not show front. No trumpet shown. (4) A schematic of the 18th, 1796-1806, shows white shell jacket, no sash, red collar and cuffs, white (silver?) edging as for the 15th. Shows lace up the seams of the back from near waste to near shoulder. mid- to dark gray breeches with two wide stripes down the side. When they became hussars, the troopers had white collar and pointed cuffs, and a bag on the busby of light blue. This white-coated trumpeter is essentially reversed color, but with red collar and cuffs. (5) Trumpeter of the 18th, campaign dress, 1808, wears a French-looking black colpak, white raquettes on right side with brided white cord draped down across the front and probably around and up the back. fluffy white plume on left, lower 1/3 scarlet, upper white. Scarlet (NOT reverse color as before) shell jacket as for those just before, white or silver cords and trim, dark blue collar and pointed cuffs, edged white or silver. Overalls are light gray, buttoned up the side, no tapes. Looks like light leather lining against the horse and saddle area. Definitely mounted on a gray, darker than the breeches! Simple dark blue blanket rolled over the pistol hoslters, dark blue simple blanket under the saddle, round cantlepack in dark blue, may be edged white. Black leather halter and other straps on the horse. Steel bugle, steel sabre knuckle guard and scabbard. (6) Trumpet Major 13th, 1807-12, schematic. Dark blue collar, cuffs, and panel behind 4 down-pointed gold shevrons on right arm, buff shell jacket as earlier, edged gold. The entire front is tight gold laces with white buttons! Blue gray overalls with two gold stripes. (7)1813-1815 shows trumpeter of 23th, service dress, looking like trooper with dare blue double-breasted jacket with red collar, cuffs, red/blue girdle. Gold (brass) bugle (no cords). (8) Also, schematic of trumpet major of 13th, 1815, light buff collar, cuffs, polish turnbacks, lapels edged gold. lt buff/dk blue girdle. Gold epaulettes, 4 gold downward pointed chevrons on right sleeve.